Choosing Metal Roof Sheeting That’s Right for Your Building
Your roof serves as the primary defence against the elements, so choosing metal roof sheeting for a new build or to replace an aged structure is one of the most critical decisions you can make. Beyond aesthetics, the right choice is about balancing durability, long-term value, and climate resilience. With various profiles and finishes available, selecting the ideal roofing material requires understanding how the different types perform under pressure. Let the experts at Chemvet Steel & Fencing explain.
Understand the Different Types Before Choosing Metal Roof Sheeting
The South African market offers several distinct profiles, each engineered for specific structural needs. Choosing metal roof sheeting requires understanding the different types available from us at Chemvet, allowing you to make an informed decision.
- Corrugated
Classic corrugated roofing is incredibly versatile and remains a popular choice for agricultural and light industrial buildings due to its affordability, strength, and ease of installation. Distinguished by its wave-like pattern, the S-rib profile of this roofing generally requires a steeper pitch to ensure efficient water runoff, aiding in weather resistance.
- IBR
Inverted Box Rib, or IBR, roofing offers a modern square fluted profile for rigidity and superb strength, making this choice ideal for larger spans without excessive sagging. The clean lines give a contemporary finish that works well on commercial buildings and homes. The pronounced ribs provide excellent drainage and optimal weight versus span capabilities.
- Widespan
This option is designed for large buildings that require fewer support purlins, reducing installation time and structural cost. The deep ribbed design, combined with a thick gauge, makes this metal roof type the ideal choice if you need a strong roof that spans broad distances with less material. Widespan delivers excellent load capacity and structural integrity, perfect for warehouses, factories, and large commercial structures.
- Craft-Lock®
The engineered profile of Craft-Lock® offers a unique locking system that enhances water shedding and maximises strength. As the side lap contact area of this roofing material is minimal and allows for effective ventilation, moisture cannot become trapped. This reduces the risk of overlap corrosion and helps maintain long-term durability. Due to its structural design, it can withstand heavier roof loads such as photovoltaic panels.
Assessing Climate and Weather Resistance
In areas with intense sunlight and heat, reflective colour coatings help reduce heat absorption, enhancing interior comfort. In high-rainfall zones, profiles with deeper ribs like Widespan or Craft-Lock® help channel water away quickly. Coastal areas present a particular challenge due to the salty air, which accelerates corrosion. Here, selecting to galvanise sheeting or additional protective coatings significantly improves weather resistance and lifespan.
Matching Roof Choice to Structural Requirements
Profiles like Widespan are engineered for long load spans with minimal structural supports, reducing the need for purlins and lowering overall construction complexity. IBR also performs well across moderate spans, while corrugated sheets perform better with closer support spacing. When load span needs are high, selecting a profile with a strong span capacity is vital for structural integrity. Understanding your building’s load requirements helps you select a roof that won’t sag or require costly reinforcements later.
Choosing metal roof sheeting that ticks all the boxes is as simple as consulting with the team at Chemvet Steel & Fencing. Your choice of corrugated, IBR, or Widespan roof can be factory cranked, curved, and bullnosed to your specific requirements. We are always available to offer expert guidance and professional assistance on the type of metal roofing and cladding that will protect your building for decades.
